CN111363969A - Corrosion-resistant marine accessory and manufacturing method thereof - Google Patents
Corrosion-resistant marine accessory and manufacturing method thereof Download PDFInfo
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- CN111363969A CN111363969A CN202010274454.3A CN202010274454A CN111363969A CN 111363969 A CN111363969 A CN 111363969A CN 202010274454 A CN202010274454 A CN 202010274454A CN 111363969 A CN111363969 A CN 111363969A
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- 238000005260 corrosion Methods 0.000 title claims abstract description 49
- 230000007797 corrosion Effects 0.000 title claims abstract description 49
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 44
- 239000012535 impurity Substances 0.000 claims abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 119
- 229910052742 iron Inorganic materials 0.000 claims description 56
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 36
- 229910052786 argon Inorganic materials 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 24
- 238000007670 refining Methods 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 17
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000003723 Smelting Methods 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- 229910000990 Ni alloy Inorganic materials 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 claims description 7
- LNSPFAOULBTYBI-UHFFFAOYSA-N [O].C#C Chemical group [O].C#C LNSPFAOULBTYBI-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 229910001610 cryolite Inorganic materials 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 6
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
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- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 6
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- 238000007747 plating Methods 0.000 claims description 6
- 238000003303 reheating Methods 0.000 claims description 6
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- 238000003756 stirring Methods 0.000 claims description 6
- 229910052720 vanadium Inorganic materials 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000013535 sea water Substances 0.000 abstract description 13
- 239000000126 substance Substances 0.000 abstract description 6
- 244000005700 microbiome Species 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 25
- 239000003921 oil Substances 0.000 description 16
- 239000011651 chromium Substances 0.000 description 13
- 239000011572 manganese Substances 0.000 description 13
- 239000010949 copper Substances 0.000 description 11
- 238000012545 processing Methods 0.000 description 8
- 229910045601 alloy Inorganic materials 0.000 description 6
- 239000000956 alloy Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000010721 machine oil Substances 0.000 description 5
- 229910052750 molybdenum Inorganic materials 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052787 antimony Inorganic materials 0.000 description 2
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
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- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
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- 238000003672 processing method Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 239000003181 biological factor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
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- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/04—Making ferrous alloys by melting
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/0006—Adding metallic additives
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/072—Treatment with gases
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/10—Handling in a vacuum
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/34—Methods of heating
- C21D1/52—Methods of heating with flames
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/005—Heat treatment of ferrous alloys containing Mn
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
- C21D6/008—Heat treatment of ferrous alloys containing Si
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/46—Ferrous alloys, e.g. steel alloys containing chromium with nickel with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a corrosion-resistant marine accessory and a manufacturing method thereof, wherein the accessory is manufactured and molded by adopting a specific material, and the specific material comprises the following components in parts by weight: 1.1-1.5; p: 0.03-0.06; s: 0.03-0.05; si: 0.8-1.0; mn: 1.1-1.4; ba: 1.1-1.7; mg: 2.5-2.7; cr: 4.2-4.9; mo: 3.5-4.1; ni: 5.4-6.1; ti: 0.71-0.79; be: 0.02-0.06; cu: 1.1-1.7; co: 1.4-1.6; v: 0.4-0.9; b: 0.03-0.09; the balance being Fe and unavoidable impurities. The invention also provides a manufacturing method of the corrosion-resistant marine fitting. The marine fittings provided by the invention can avoid biological corrosion caused by adhesion of marine microorganisms on the surfaces of the marine fittings, and also greatly improve the seawater chemical corrosion resistance.
Description
Technical Field
The invention relates to a fitting material and a processing method, in particular to a marine fitting with strong corrosion resistance and a manufacturing method thereof, belonging to the technical field of processing methods of marine fittings.
Background
With the progress of the overall technology level, more and more countries promote the utilization and development of oceans to the strategic height of national development. In order to develop and utilize marine resources reasonably and effectively, it is important to develop marine fittings with high corrosion resistance.
Because of the unique properties of seawater, the factors that affect the corrosion of marine accessories (such as boat anchors, wire ropes, balance fins, etc.) in a seawater environment are also numerous, including chemical, physical and biological factors. These factors are generally correlated, and therefore, even if a certain corrosion resistance effect is obtained by starting from a material used for a marine fitting, the result is not satisfactory in the long term.
At present, most of the materials used in the marine engineering and shipbuilding industries are carbon steel and low alloy steel. For carbon steel and low alloy steel, the corrosion type in marine environment mainly includes non-uniform general corrosion and pitting corrosion, for example, Chinese patent with patent application No. 200510017821.7 entitled "alloy cast iron resisting seawater corrosion" discloses an alloy containing 0.8-3.2 of nickel, 0.6-1.2 of chromium, 1.2-2.2 of silicon, 2.8-3.4 of carbon, 05-1.2 of manganese, 0.4-0.8 of copper and 0.1-0.4 of antimony in weight ratio, the impurities are controlled to be not more than 0.12, and the balance is iron, so that the alloy has better corrosion resistance and stronger mechanical property.
However, although this material is capable of forming a protective film on the surface of the marine parts at an early stage and has an effect of chemical resistance, the material is affected by the biological corrosion factor of seawater and the chemical resistance is gradually lowered, and the service life of the parts is shortened, and thus the material cannot meet the demand.
Therefore, the development of a new marine fitting and a manufacturing method thereof not only have urgent research values, but also have good economic benefits and industrial application potential, which are the basis and the motivation for the completion of the invention.
Disclosure of Invention
In order to overcome the above-identified drawbacks of the conventional marine fittings, the present inventors have made intensive studies and, after having paid a lot of creative efforts, have completed the present invention.
Specifically, the technical problems to be solved by the present invention are: the corrosion-resistant marine fitting and the manufacturing method thereof are provided to solve the technical problem that the corrosion resistance of the existing marine fitting is not guaranteed under various corrosion factors of seawater.
In order to solve the technical problems, the technical scheme of the invention is to provide a corrosion-resistant marine fitting which is manufactured and molded by adopting a specific material, wherein the specific material comprises the following components in parts by weight: 1.1-1.5; p: 0.03-0.06; s: 0.03-0.05; si: 0.8-1.0; mn: 1.1-1.4; ba: 1.1-1.7; mg: 2.5-2.7; cr: 4.2-4.9; mo: 3.5-4.1; ni: 5.4-6.1; ti: 0.71-0.79; be: 0.02-0.06; cu: 1.1-1.7; co: 1.4-1.6; v: 0.4-0.9; b: 0.03-0.09; the balance being Fe and unavoidable impurities.
In the corrosion-resistant marine fitting of the present invention, as an optimal choice, the specific material contains, in parts by weight, C: 1.3; p: 0.045; s: 0.04; si: 0.9; mn: 1.25; ba: 1.4; mg: 2.6; cr: 4.6; mo: 3.8 of the total weight of the mixture; ni: 5.7; ti: 0.76; be: 0.04; cu: 1.4; co: 1.5; v: 0.6; b: 0.06; the balance being Fe and unavoidable impurities.
The manufacturing method of the corrosion-resistant marine fitting comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to be 1405-1410 ℃, and pouring the molten iron into a metal mold to cast into an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm and × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace for one time, adding cryolite for covering in the melting process, stirring once every 10-15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 60-65L/min for 1-3 hours at the early stage, controlling the argon inlet speed to Be 35L/min for 2-2.3 hours at the middle stage, controlling the argon inlet speed to Be 15L/min for 1-1.3 hours at the later stage, feeding raw Mg, Cu, Ba and Be materials in sequence when the temperature of the molten iron is 1410-1415 ℃, feeding raw Ni, Ti, Co, V, Cr and Mo materials in sequence when the temperature of the molten iron rises to 1970-1985 ℃, finally feeding B materials, and controlling the outlet temperature of the LF furnace to Be 1510-1550 ℃; other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the treatment time of a steel ladle on an RH station is 40-45 min, the equivalent times of circulating molten iron in the treatment process is 4 times, and the circulating flow is 35-37 t/min;
(5) casting to form the required marine fittings;
(6) preserving the heat of the marine parts obtained in the step (5) at 960-980 ℃, putting the marine parts into a furnace body containing carbon and nitrogen media, continuously preserving the heat for 2-2.6 hours, then spraying flame combusted by oxygen-acetylene mixed gas onto the surfaces of the marine parts, rapidly heating, immediately spraying water for cooling when the temperature reaches 1050-1070 ℃, then reheating the marine parts to 950-960 ℃, preserving the heat for 1.2-1.4 hours, and cooling in cooling oil;
(7) and (4) plating a 0.5-0.7 mm chromium-nickel alloy layer on the surface of the marine accessory in the step (6), so as to obtain the finished marine accessory.
In the casting process of the train accessory of the present invention, as an improvement, in the step (3), the B material is a nano-scale powder.
In the casting process of the train accessory, as an improvement, in the step (6), the cooling oil is a mixed oil of standard machine oils of No. 32, No. 46 and No. 68, and the weight ratio is 3: 1.5: 1. the adjustment of the cooling oil plays a great role in the whole production process: can ensure that the marine fittings have smooth surfaces and good hardenability when being cooled, and is beneficial to the next procedure, namely the coating of the chrome-nickel alloy layer.
In the casting process of the train accessory, step (5) can adopt a corresponding casting process method as required, and details are not described herein.
After the technical scheme is adopted, the invention has the beneficial effects that:
the components adopted by the invention are determined through a large number of repeated experiments of the inventor with creative labor, for example, Cr in the components can greatly improve the corrosion resistance of the marine fittings, particularly, Cr can improve the stability of the passive film and can prevent the passive film from cracking to generate pitting corrosion, which has very important effect on the seawater corrosion resistance of the marine fittings. For another example, Mo in the component has the effect of improving the surface film property of the alloy, and has important significance for improving the pitting corrosion resistance of the alloy. The Mo and the Ni in the components can generate complex reaction, the reducing medium resistance of the marine fittings can be obviously improved, particularly the HCl resistance can be improved, and the seawater chemical corrosion is mainly the chloride ion corrosion, which greatly improves the seawater corrosion resistance of the marine fittings.
In addition, other components in the invention, such as Mn, can improve the fracture toughness and fatigue performance of the marine fittings, Mn is contained in the material to enable the fittings to deform uniformly, meanwhile, cracks can be formed in the whole crystal grains instead of being concentrated at the boundary, on the other hand, Mn is also contained in the material to be the resistance of crack propagation, when the crack tip is propagated to the Mn-containing phase, the crack deflects, the crack expansion path is increased, and thus the fracture toughness and fatigue resistance of the material are improved. The added B material can improve hardenability, and the action mechanism is as follows: b is partially polymerized in an austenite boundary, C, P element in the component has an important influence on the improvement of the hardenability of the part by the B, and the hardenability of the part is remarkably improved and stabilized by the composite action of various elements, so that the method has very important significance for the subsequent quenching and chromium-plated nickel alloy layer connection of the part.
The chromium-nickel alloy layer plated on the surface of the marine accessory provided by the invention has the advantages of higher stability, compact film formation and high smoothness, and biological corrosion caused by adhesion of marine microorganisms on the surface of the marine accessory is avoided.
Meanwhile, the preparation method of the marine part provided by the invention is related to the components adopted by the marine part, for example, the B material is added in a nano powder form, can be uniformly mixed in a phase, and obviously improves and stabilizes the hardenability of the part by utilizing the composite action of multiple elements, so that the preparation method has very important significance for the subsequent quenching and chromium-plated nickel alloy layer correlation of the part.
In conclusion, the marine fittings provided by the invention can avoid biological corrosion caused by adhesion of marine microorganisms on the surfaces of the marine fittings, and the seawater chemical corrosion resistance is also greatly improved.
Detailed Description
The present invention will be further described with reference to the following examples. The use and purpose of these exemplary embodiments are to illustrate the present invention, not to limit the actual scope of the present invention in any way, and not to limit the scope of the present invention in any way.
Example 1
A corrosion-resistant marine fitting is manufactured and molded by adopting a specific material, wherein the specific material comprises, by weight, 1.1 parts of C, 0.04 parts of P, 0.03 parts of S, 0.8 parts of Si, 1.2 parts of Mn, 1.3 parts of Ba, 2.5 parts of Mg, 4.5 parts of Cr, 3.7 parts of Mo, 5.6 parts of Ni, 0.75 parts of Ti, 0.03 parts of Be, 1.3 parts of Cu, 1.4 parts of Co, 0.5 parts of V and 0.05 parts of B, and the balance of Fe and inevitable impurities.
The manufacturing method of the corrosion-resistant marine fitting comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to be 1405-1410 ℃, and pouring the molten iron into a metal mold to cast into an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm and × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace for one time, adding cryolite for covering in the melting process, stirring once every 10-15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 60L/min at the early stage for 1-3 hours, controlling the argon inlet speed to Be 35L/min at the middle stage for 2 hours, controlling the argon inlet speed to Be 15L/min at the later stage for 1 hour, feeding Mg, Cu, Ba and Be raw materials in sequence when the molten iron temperature is 1410 ℃, feeding Ni, Ti, Co, V, Cr and Mo raw materials in sequence when the molten iron temperature rises to 1970 ℃, finally feeding nano-grade powder B, and controlling the outlet temperature of the LF furnace to Be 1510 ℃; other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the processing time of a ladle at an RH station is 40min, the equivalent times of circulating molten iron in the processing process are 4 times, and the circulating flow is 35 t/min;
(5) casting to form the required marine fittings;
(6) keeping the temperature of the marine parts obtained in the step (5) at 960 ℃, putting the marine parts into a furnace body containing carbon and nitrogen media, keeping the temperature for 2 hours continuously, then spraying flame combusted by oxygen-acetylene mixed gas onto the surface of the marine parts, quickly heating, immediately spraying water for cooling when the temperature reaches 1050 ℃, then reheating the marine parts to 950 ℃, keeping the temperature for 1.2 hours, and cooling in cooling oil, wherein the cooling oil is mixed oil of No. 32, No. 46 and No. 68 standard machine oil, and the weight ratio is 3: 1.5: 1;
(7) and (4) plating a 0.5mm chromium-nickel alloy layer on the surface of the marine part in the step (6) to obtain the finished marine part.
Example 2
A corrosion-resistant marine fitting is manufactured and molded by adopting a specific material, wherein the specific material comprises, by weight, 1.3 parts of C, 0.045 parts of P, 0.04 parts of S, 0.9 parts of Si, 1.25 parts of Mn, 1.4 parts of Ba, 2.6 parts of Mg, 4.6 parts of Cr, 3.8 parts of Mo, 5.7 parts of Ni, 0.76 parts of Ti, 0.04 parts of Be, 1.4 parts of Cu, 1.5 parts of Co, 0.6 parts of V and 0.06 parts of B, and the balance of Fe and inevitable impurities.
The manufacturing method of the corrosion-resistant marine fitting comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to be 1405-1410 ℃, and pouring the molten iron into a metal mold to cast into an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm and × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace for one time, adding cryolite for covering in the melting process, stirring once every 10-15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 63L/min for 1-3 hours in the early stage, controlling the argon inlet speed to Be 35L/min for 2.1 hours in the middle stage, controlling the argon inlet speed to Be 15L/min for 1.2 hours in the later stage, feeding raw Mg, Cu, Ba and Be materials in sequence when the temperature of the molten iron is 1413 ℃, feeding raw Ni, Ti, Co, V, Cr and Mo materials in sequence when the temperature of the molten iron rises to 1980 ℃, finally feeding nano-grade B material powder, and controlling the outlet temperature of the LF furnace to Be 1530 ℃; other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the processing time of a ladle at an RH station is 43min, the equivalent times of circulating molten iron in the processing process are 4 times, and the circulating flow is 36 t/min;
(5) casting and molding to obtain the required marine fittings;
(6) keeping the temperature of the marine part obtained in the step (5) at 970 ℃, putting the marine part into a furnace body containing carbon and nitrogen media, keeping the temperature for 2.3h, then spraying flame combusted by oxygen-acetylene mixed gas onto the surface of the marine part, quickly heating, immediately spraying water for cooling when the temperature reaches 1060 ℃, then reheating the marine part to 955 ℃, keeping the temperature for 1.3h, and cooling in cooling oil, wherein the cooling oil is mixed oil of No. 32, No. 46 and No. 68 standard machine oil, and the weight ratio is 3: 1.5: 1;
(7) and (4) plating a 0.6mm chromium-nickel alloy layer on the surface of the marine part in the step (6) to obtain the finished marine part.
Example 3
A corrosion-resistant marine fitting is manufactured and molded by adopting a specific material, wherein the specific material comprises, by weight, 1.5 parts of C, 0.05 parts of P, 0.05 parts of S, 1.0 parts of Si, 1.3 parts of Mn, 1.5 parts of Ba, 2.7 parts of Mg, 4.7 parts of Cr, 3.9 parts of Mo, 5.8 parts of Ni, 0.77 parts of Ti, 0.05 parts of Be, 1.5 parts of Cu, 1.6 parts of Co, 0.7 parts of V and 0.07 parts of B, and the balance of Fe and inevitable impurities.
The manufacturing method of the corrosion-resistant marine fitting comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to be 1405-1410 ℃, and pouring the molten iron into a metal mold to cast into an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace at one time, adding cryolite for covering in the melting process, stirring once every 15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 65L/min at the early stage for 3 hours, controlling the argon inlet speed to Be 35L/min at the middle stage for 2.3 hours, controlling the argon inlet speed to Be 15L/min at the later stage for 1.3 hours, feeding raw Mg, Cu, Ba and Be materials in sequence when the temperature of the molten iron is 1415 ℃, feeding raw Ni, Ti, Co, V, Cr and Mo materials in sequence when the temperature of the molten iron rises to 1985 ℃, and finally feeding B powder materials in a nanometer level, wherein the outlet temperature of the LF furnace is controlled to Be 1550 ℃; other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the processing time of a ladle at an RH station is 45min, the equivalent times of circulating molten iron in the processing process are 4 times, and the circulating flow is 37 t/min;
(5) casting to form the required marine fittings;
(6) keeping the temperature of the marine parts obtained in the step (5) at 980 ℃, putting the marine parts into a furnace body containing carbon and nitrogen media, keeping the temperature for 2.6h, then spraying flame combusted by oxygen-acetylene mixed gas onto the surface of the marine parts, quickly heating, immediately spraying water for cooling when the temperature reaches 1070 ℃, then reheating the marine parts to 960 ℃, keeping the temperature for 1.4h, and cooling in cooling oil, wherein the cooling oil is mixed oil of No. 32, No. 46 and No. 68 standard machine oil, and the weight ratio is 3: 1.5: 1;
(7) and (4) plating a 0.7mm chromium-nickel alloy layer on the surface of the marine part in the step (6) to obtain the finished marine part.
Example 4
A corrosion-resistant marine fitting is manufactured and molded by adopting a specific material, wherein the specific material comprises, by weight, 1.1 parts of C, 0.05 parts of P, 0.05 parts of S, 0.8 parts of Si, 1.25 parts of Mn, 1.3 parts of Ba, 2.7 parts of Mg2.7 parts of Cr, 4.6 parts of Mo, 3.9 parts of Ni, 5.7 parts of Ti, 0.75 parts of Be0.05 parts of Cu, 1.4 parts of Co, 0.6 parts of V and 0.06 parts of B, and the balance of Fe and inevitable impurities.
The manufacturing method of the corrosion-resistant marine fitting comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to 1405 ℃, and pouring the molten iron into a metal mold to cast an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm and × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace for one time, adding cryolite for covering in the melting process, stirring once every 10-15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 63L/min for 2.5 hours in the early stage, controlling the argon inlet speed to Be 35L/min for 2.3 hours in the middle stage, controlling the argon inlet speed to Be 15L/min in the later stage for 1.3 hours, feeding raw Mg, Cu, Ba and Be materials in sequence when the temperature of the molten iron is 1412 ℃, feeding raw Ni, Ti, Co, V, Cr and Mo materials in sequence when the temperature of the molten iron rises to 1980 ℃, finally feeding B materials, controlling the outlet temperature of the LF furnace to Be 1550 ℃, and controlling the B materials to Be nano-grade powder;
other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the processing time of a ladle on an RH station is 45min, the equivalent times of circulating molten iron in the processing process are 4 times, and the circulating flow is 35 t/min;
(5) casting to form the required marine fittings;
(6) keeping the temperature of the marine parts obtained in the step (5) at 960 ℃, putting the marine parts into a furnace body containing carbon and nitrogen media, keeping the temperature for 2.5h, then spraying flame combusted by oxygen-acetylene mixed gas onto the surface of the marine parts, quickly heating, immediately spraying water for cooling when the temperature reaches 1060 ℃, then reheating the marine parts to 950 ℃, keeping the temperature for 1.4h, and cooling in cooling oil, wherein the cooling oil is mixed oil of No. 32, No. 46 and No. 68 standard machine oil, and the weight ratio is 3: 1.5: 1;
(7) and (4) plating a 0.7mm chromium-nickel alloy layer on the surface of the marine part in the step (6) to obtain the finished marine part.
Comparative example 1
The alloy mentioned in the background technology is adopted, and comprises 0.8-3.2 percent of nickel, 0.6-1.2 percent of chromium, 1.2-2.2 percent of silicon, 2.8-3.4 percent of carbon, 05-1.2 percent of manganese, 0.4-0.8 percent of copper and 0.1-0.4 percent of antimony by weight ratio, the impurities are controlled to be not more than 0.12 percent of sulfur, and the balance is iron.
Casting the marine fittings, and coating the surface with seawater anticorrosive paint according to the traditional anticorrosive method.
Comparative example 2
The marine fittings cast by the most common corrosion-resistant cast iron STSI14.5Cu3 in the industry at present are coated with seawater corrosion-resistant paint on the surface according to the traditional corrosion-resistant method.
The marine parts of examples 1 to 4 and comparative examples 1 and 2 were subjected to a sea coupon test for one year according to a standard method (GB6384-86) for measuring seawater corrosion resistance of the material, and the marine biofilm coverage area ratio of the marine parts was varied, and the results were evaluated after marine biofilm removal and acid pickling:
it is apparent from the evaluation table that the marine fittings of examples 1 to 4 have a certain resistance to the formation of surface marine biofilms and thus have a good effect on marine corrosion. And other corrosion indicators are higher than those of the existing marine fittings.
It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should also be understood that various alterations, modifications and/or variations can be made to the present invention by those skilled in the art after reading the technical content of the present invention, and all such equivalents fall within the protective scope defined by the claims of the present application.
Claims (3)
1. Corrosion-resistant marine accessory, its characterized in that: the material is manufactured and molded by adopting specific materials, wherein the specific materials comprise, by weight, 1.1-1.5 parts of C, 0.04-0.05 part of P, 0.03-0.05 part of S, 0.8-1.0 part of Si, 1.2-1.3 parts of Mn, 1.3-1.5 parts of Ba, 2.5-2.7 parts of Mg, 4.5-4.7 parts of Cr, 5.6-5.8 parts of Ni, 0.75-0.77 part of Ti, 0.03-0.05 part of Be, 1.3-1.5 parts of Cu, 1.4-1.6 parts of Co, 0.5-0.7 part of V, 0.05-0.07 part of B, and the balance of Fe and inevitable impurities.
2. A corrosion resistant marine fitting according to claim 1 wherein: the specific material comprises, by weight, C1.3, P0.045, S0.04, Si 0.9, Mn 1.25, Ba 1.4, Mg 2.6, Cr 4.6, Ni 5.7, Ti 0.76, Be0.04, Cu 1.4, Co 1.5, V0.6 and B0.06.
3. A method of manufacturing a corrosion resistant marine fitting according to claim 1 or 2, wherein: the method comprises the following steps:
(1) the method comprises the following steps of (1) carrying out primary smelting on a blast furnace batch, and melting furnace burden into molten iron with the following components: 3.1-4.5 of C, less than 0.1 of P, less than 0.1 of S, 2.8-4.0 of Si and less than or equal to 2.0 of Mn; controlling the tapping temperature of the molten iron to be 1405-1410 ℃, and pouring the molten iron into a metal mold to cast into an iron ingot;
(2) crushing the iron ingot obtained by casting in the step (1) into blocks of 165mm and × 215mm, putting the blocks into a medium-frequency coreless induction heating electric furnace for one time, adding cryolite for covering in the melting process, stirring once every 10-15 minutes, and removing generated slag;
(3) smelting the molten iron generated in the step (2) by using an LF furnace, blowing argon in the whole process, controlling the argon inlet speed to Be 60-65L/min for 1-3 hours at the early stage, controlling the argon inlet speed to Be 35L/min for 2-2.3 hours at the middle stage, controlling the argon inlet speed to Be 15L/min for 1-1.3 hours at the later stage, feeding Mg, Cu, Ba and Be raw materials in sequence when the temperature of the molten iron is 1410-1415 ℃, feeding Ni, Ti, Co, V and Cr raw materials in sequence when the temperature of the molten iron rises to 1970-1985 ℃, finally feeding B materials, and controlling the outlet temperature of the LF furnace to Be 1510-1550 ℃;
other procedures such as deoxidation, white slag and the like are adjusted according to actual requirements;
(4) RH refining, wherein a vacuum chamber is preheated before refining, the vacuum chamber is continuously heated in a refining gap and a refining process, the treatment time of a steel ladle on an RH station is 40-45 min, the equivalent times of circulating molten iron in the treatment process is 4 times, and the circulating flow is 35-37 t/min;
(5) casting to form the required marine fittings;
(6) preserving the heat of the marine parts obtained in the step (5) at 960-980 ℃, putting the marine parts into a furnace body containing carbon and nitrogen media, continuously preserving the heat for 2-2.6 hours, then spraying flame combusted by oxygen-acetylene mixed gas onto the surfaces of the marine parts, rapidly heating, immediately spraying water for cooling when the temperature reaches 1050-1070 ℃, then reheating the marine parts to 950-960 ℃, preserving the heat for 1.2-1.4 hours, and cooling in cooling oil;
(7) and (4) plating a 0.5-0.7 mm chromium-nickel alloy layer on the surface of the marine accessory in the step (6), so as to obtain the finished marine accessory.
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| CN112267069A (en) * | 2020-09-30 | 2021-01-26 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for 2100MPa grade galvanized steel wire and its manufacturing method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106756531A (en) * | 2016-11-23 | 2017-05-31 | 李光根 | A kind of accessory peculiar to vessel and its method for anticorrosion-treating and corrosion-resistant accessory peculiar to vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106756531A (en) * | 2016-11-23 | 2017-05-31 | 李光根 | A kind of accessory peculiar to vessel and its method for anticorrosion-treating and corrosion-resistant accessory peculiar to vessel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112267069A (en) * | 2020-09-30 | 2021-01-26 | 江苏省沙钢钢铁研究院有限公司 | Wire rod for 2100MPa grade galvanized steel wire and its manufacturing method |
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